Set top box upper shell pin-point gate-to-large gate pouring one-out-four mold structure

Abstract

The utility model relates to the technical field of injection molds, in particular to a set top box upper shell pin-point gate-to-large gate inlet pouring one-out-four mold structure which comprises a rear bottom plate, the upper surface of the rear bottom plate is fixedly connected with a limiting rod, the outer surface of the limiting rod is connected with a front bottom plate in a nested mode, and a main runner is arranged on the upper surface of the front bottom plate close to the center position. According to the injection mold, injection molding and mold stripping can be carried out on four injection molding parts at the same time, the injection molding efficiency is improved, on the premise that the first ejector pin fixing plate and the second ejector pin fixing plate are not detached, after the mold is opened, the connecting cylinder is rotated, the connecting cylinder and the ejector pin base can be separated, the inner core is pulled upwards, and therefore the injection molding efficiency is improved. The tail end of the inner core is separated from the ejector pin seat, the damaged inner core can be taken out, the whole ejector pin seat and the connecting cylinder do not need to be disassembled, and therefore the inner core replacement process is simplified, and replacement of a single damaged inner core in the later period is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is a set top box upper shell thin water gap changes big water gap pours one four mould structure. BACKGROUND

[0002] Injection mold is a kind of tool for producing plastic product, and is the tool for giving plastic product complete structure and accurate size.Injection molding is a kind of processing method for batch producing some complex parts, specifically refers to the high pressure injection of heated molten plastic into mold cavity by injection molding machine, after cooling solidification, get shaped product, thin water gate is a kind of small gate, it can reduce material waste, improve the appearance quality of product, in some cases, in order to improve the flow and filling of material, thin water gate can need to be converted into larger water gate to reduce flow resistance and ensure that material can uniformly fill the mold, but the mold in the prior art has certain drawbacks when using, such as the plastic shell injection mold of one publication number CN220903988U, the cooperation of pull rod and sliding pin makes when the upper die plate and the lower die plate separate, workbench can be synchronous upwardly overturned, the plastic shell of injection molding is moved to the front side, it is convenient for staff to take, reduces the labor intensity of staff and improves safety;

[0003] The above device is convenient for workers to take, but only one injection molding part can be produced at a time, leading to low injection molding efficiency, and when used for set top box production, the side of the set top box is provided with a hole, and the side mold will affect the ejection of the set top box, in addition, the inner core contacts the set top box, and when a single inner core is damaged, the whole No. 1 ejector pin fixing plate and No. 2 ejector pin fixing plate need to be disassembled, increasing the steps required for replacing the inner core. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a set top box upper shell thin water gate changes big water gate pours one four mould structure to solve the problems in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A set-top box upper shell sprue mold structure with a small gate to a large gate inlet and a four-way gate, including a rear base plate, a limit rod fixedly connected to the upper surface of the rear base plate, a front base plate nested on the outer surface of the limit rod, a main runner near the center of the upper surface of the front base plate, an auxiliary runner fixedly connected to the lower end of the main runner, a front mounting plate detachably connected to the lower surface of the front base plate, a front mold frame detachably connected to the lower surface of the front mounting plate, a front mold core embedded on the lower surface of the front mold frame, a rear mold frame nested on the outer surface of the limit rod, a rear mold core embedded on the upper surface of the rear mold frame, a second ejector pin fixing plate fixedly connected to the upper surface of the rear base plate, a first ejector pin fixing plate detachably connected to the upper surface of the second ejector pin fixing plate, and an ejector pin seat engaging between the first and second ejector pin fixing plates.

[0007] Furthermore, a hot runner is provided inside the front mold frame near the front mold core.

[0008] Furthermore, the upper surface of the rear mold frame is detachably connected to a slide rail, the slide rail is slidably connected to a slider, the side surface of the slider is slidably connected to a side mold, the upper surface of the slider is slidably connected to an extrusion block, and the outer surface of the slider is nested with a spring, which abuts against the rear mold core.

[0009] Furthermore, the upper surface of the rear base plate is detachably connected with a square iron.

[0010] Furthermore, a guide rod is fixedly connected to the upper surface of the second ejector pin fixing plate, and a hydraulic cylinder is embedded and fixedly connected to the upper surface of the second ejector pin fixing plate, with the output end of the hydraulic cylinder abutting against the rear base plate.

[0011] Furthermore, a limiting hole is provided on the upper surface of the second ejector pin fixing plate, and the ejector pin seat is placed in the limiting hole.

[0012] Furthermore, the upper surface of the ejector pin seat is threaded with a connecting cylinder, the upper end of the connecting cylinder is threaded with a limiting sleeve, and an inner core is inserted inside the limiting sleeve.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] After the extrusion block is lifted, it rises along the inclined surface of the slider. Under the elastic force of the spring, the slider drives the side mold to move, separating the side mold from the rear mold core and separating the side mold from the hole on the side of the injection molded part. This makes it easier to eject the injection molded part through the inner core later. The same principle applies to other injection molded parts. Four injection molded parts can be injected and ejected at the same time, improving injection efficiency.

[0015] Without disassembling the first ejector pin fixing plate and the second ejector pin fixing plate, after the mold is opened, the connecting barrel is rotated, the connecting barrel and the ejector pin seat are separated, the inner core is pulled up, the end of the inner core and the ejector pin seat are separated, the damaged inner core can be taken out, the whole ejector pin seat and the connecting barrel do not need to be disassembled, so that the process of replacing the inner core is simplified, and the single damaged inner core is convenient to replace in the later period. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the overall schematic diagram of the utility model;

[0017] Figure 2 is the schematic diagram of the front mold core structure of the utility model;

[0018] Figure 3 is the schematic diagram of the rear mold core structure of the utility model;

[0019] Figure 4 is the schematic diagram of the ejector pin seat split structure of the utility model;

[0020] Figure 5 is the schematic diagram of the first ejector pin fixing plate split structure of the utility model;

[0021] Figure 6 is the schematic diagram of the rear bottom plate structure of the utility model;

[0022] Figure 7 is the schematic diagram of the auxiliary runner structure of the utility model.

[0023] In the drawing: 1, main runner; 101, auxiliary runner; 2, front bottom plate; 201, front mounting plate; 3, front mold frame; 301, front mold core; 302, hot runner; 4, rear mold frame; 401, rear mold core; 402, spring; 403, slide rail; 404, sliding block; 405, side edge mold; 406, extrusion block; 5, square iron; 6, first ejector pin fixing plate; 601, second ejector pin fixing plate; 602, guide rod; 603, hydraulic cylinder; 604, limiting hole; 7, rear bottom plate; 701, limiting rod; 8, ejector pin seat; 801, connecting barrel; 802, limiting sleeve; 803, inner core; 9, injection molded part. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Please refer to Figures 1-7In this embodiment of the present invention, a four-stage mold structure for a set-top box upper shell, comprising a rear base plate 7, a limiting rod 701 fixedly connected to the upper surface of the rear base plate 7, a front base plate 2 nested on the outer surface of the limiting rod 701, a main flow channel 1 near the center of the upper surface of the front base plate 2, an auxiliary flow channel 101 fixedly connected to the lower end of the main flow channel 1, a front mounting plate 201 detachably connected to the lower surface of the front base plate 2, and a front mold frame detachably connected to the lower surface of the front mounting plate 201. 3. The lower surface of the front mold base 3 is embedded with the front mold core 301. The outer surface of the limiting rod 701 is nested with the rear mold base 4. The upper surface of the rear mold base 4 is embedded with the rear mold core 401. The upper surface of the rear base plate 7 is fixedly connected with the second ejector pin fixing plate 601. The upper surface of the second ejector pin fixing plate 601 is detachably connected with the first ejector pin fixing plate 6. The first ejector pin fixing plate 6 and the second ejector pin fixing plate 601 are engaged with the ejector pin seat 8. The upper surface of the rear base plate 7 is detachably connected with the square iron 5.

[0026] Specifically, during use, the main runner 1 works in conjunction with the auxiliary runner 101 for injection molding. The auxiliary runner 101 has a small gate near the front mold core 301, which gradually expands into a large gate to ensure uniform melt flow and reduce material waste. After the mold is opened, the first ejector plate 6 moves upward and works with the ejector seat 8 to eject the injection part 9 on the rear mold core 401. At the same time, four injection parts 9 are ejected to improve the working efficiency of the mold.

[0027] Example 1

[0028] like Figures 1-7 As shown, a hot runner 302 is provided inside the front mold frame 3 near the front mold core 301.

[0029] In this embodiment, the hot runner 302 maintains the temperature of the melt in the flow path, allowing the melt to flow continuously without reheating in each injection cycle. This reduces the shear stress of the melt during the flow process, thereby reducing material degradation and improving the appearance and performance of the product.

[0030] like Figure 3 As shown, a slide rail 403 is detachably connected to the upper surface of the rear mold frame 4. A slider 404 is slidably connected inside the slide rail 403. A side mold 405 is slidably connected to the side surface of the slider 404. An extrusion block 406 is slidably connected to the upper surface of the slider 404. A spring 402 is nested on the outer surface of the slider 404. The spring 402 abuts against the rear mold core 401.

[0031] In the embodiment, after the extrusion block 406 is jacked up, the extrusion block 406 rises along the inclined surface of the sliding block 404, under the elastic force of the spring 402, the sliding block 404 drives the side mold 405 to move, so that the side mold 405 and the rear mold core 401 are separated, the side mold 405 and the hole of the side of the injection molded part 9 are separated, which facilitates the ejection of the injection molded part 9 through the inner core 803 in the later stage, and other injection molded parts 9 are the same, four injection molded parts 9 can be injection molded and ejected at the same time, and the injection molding efficiency is improved.

[0032] Embodiment two

[0033] On the basis of the first embodiment, in order to make up for the problem that the inner core 803 is inconvenient to replace in the first embodiment.

[0034] As shown in Figures 5-6 The upper surface of the second ejector pin fixing plate 601 is fixedly connected with a guide rod 602, the upper surface of the second ejector pin fixing plate 601 is fixedly connected with a hydraulic cylinder 603, the output end of the hydraulic cylinder 603 abuts against the rear bottom plate 7, the upper surface of the second ejector pin fixing plate 601 is provided with a limiting hole 604, and the ejector pin seat 8 is placed in the limiting hole 604.

[0035] In the embodiment, the output end of the hydraulic cylinder 603 is extended, the first ejector pin fixing plate 6 and the second ejector pin fixing plate 601 are lifted by cooperating with the guide rod 602, and the injection molded part 9 can be ejected by the inner core 803.

[0036] As shown in Figure 4 The upper surface of the ejector pin seat 8 is threadedly connected with a connecting barrel 801, the upper end of the connecting barrel 801 is threadedly connected with a limiting sleeve 802, and the inner core 803 is inserted into the limiting sleeve 802.

[0037] In the embodiment, without disassembling the first ejector pin fixing plate 6 and the second ejector pin fixing plate 601, after the mold is opened, the connecting barrel 801 is rotated, so that the connecting barrel 801 and the ejector pin seat 8 are separated, the inner core 803 is pulled upward, the end of the inner core 803 is separated from the ejector pin seat 8, and the damaged inner core 803 can be taken out, without disassembling the entire ejector pin seat 8 and the connecting barrel 801, so that the process of replacing the inner core 803 is simplified, and the inner core 803 is convenient to replace in the later stage.

[0038] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0039] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic specified in the present specification. The specification can also be described in terms of a single preferred embodiment, it being understood that this single preferred embodiment can exhibit not every aspect or feature of the present specification. The specification can also be described in terms of a generic statement that the disclosure can include one, some, or all of a list of features. It is further understood that the specification is to be considered as a whole and not with reference to a single feature or design element alone.

Claims

1. A set top box upper shell small gate to large gate pouring one out of four mold structure, comprising a back bottom plate (7), characterized in that, The upper surface of the rear bottom plate (7) is fixedly connected with a limiting rod (701), the outer surface of the limiting rod (701) is nested with a front bottom plate (2), the upper surface of the front bottom plate (2) is provided with a main flow channel (1) near the center position, the lower end of the main flow channel (1) is fixedly connected with an auxiliary flow channel (101), the lower surface of the front bottom plate (2) is detachably connected with a front mounting plate (201), the lower surface of the front mounting plate (201) is detachably connected with a front mold frame (3), the lower surface of the front mold frame (3) is embeddedly connected with a front mold core (301), the outer surface of the limiting rod (701) is nested with a rear mold frame (4), the upper surface of the rear mold frame (4) is embeddedly connected with a rear mold core (401), the upper surface of the rear bottom plate (7) is fixedly connected with a No.2 ejector pin fixing plate (601), the upper surface of the No.2 ejector pin fixing plate (601) is detachably connected with a No.1 ejector pin fixing plate (6), the No.1 ejector pin fixing plate (6) and the No.2 ejector pin fixing plate (601) are clampedly connected with an ejector pin seat (8).

2. The mold structure for a top case of a set top box from small water gate to large water gate pouring in one and four out according to claim 1, characterized in that, The inner part of the front mold frame (3) is provided with a hot runner (302) near the front mold core (301).

3. The mold structure for a set-top box upper case from a small gate to a large gate pouring with one out of four according to claim 1, wherein, The upper surface of the rear mold frame (4) is detachably connected with a slide rail (403), the inner part of the slide rail (403) is slidably connected with a sliding block (404), the side surface of the sliding block (404) is slidably connected with a side edge mold (405), the upper surface of the sliding block (404) is slidably connected with an extrusion block (406), the outer surface of the sliding block (404) is nested with a spring (402), and the spring (402) is in contact with the rear mold core (401).

4. The mold structure for a set-top box upper case from a small gate to a large gate pouring with one out of four according to claim 1, wherein, The upper surface of the rear bottom plate (7) is detachably connected with a square iron (5).

5. The mold structure for a set-top box upper case from a small gate to a large gate pouring with one out of four according to claim 1, wherein, The upper surface of the No.2 ejector pin fixing plate (601) is fixedly connected with a guide rod (602), and the upper surface of the No.2 ejector pin fixing plate (601) is embeddedly and fixedly connected with a hydraulic cylinder (603), and the output end of the hydraulic cylinder (603) is in contact with the rear bottom plate (7).

6. The structure of a four-cavity mold for a top case of a set-top box with fine gate to large gate pouring in and four cavities out according to claim 1, wherein The upper surface of the No.2 ejector pin fixing plate (601) is provided with a limiting hole (604), and the ejector pin seat (8) is placed in the limiting hole (604).

7. The mold structure for a set-top box upper case from a small gate to a large gate pouring with one out of four according to claim 1, wherein, The upper surface of the ejector pin seat (8) is threadedly connected with a connecting barrel (801), the upper end of the connecting barrel (801) is threadedly connected with a limiting sleeve (802), and the inner part of the limiting sleeve (802) is inserted with an inner core (803).

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